Aluminum plastic film package material for lithium battery

Active Publication Date: 2014-02-05

NANYA PLASTICS CORP

6 Cites 25 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0015] However, the lithium battery packaging materials made by the above-mentioned prior art still cannot meet the re...

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Method used

(1) each embodiment compares with comparative example 3, laminating glue contains epoxy resin and can promote inner layer/aluminum foil layer resistance to electrolyte adhesion.

(6) in embodiment 3,4 and 7, binding agent collocates novolac phenol formaldehyde epoxy resin, novolac naphthalene ring formaldehyde epoxy resin, novolac biphenyl formaldehyde epoxy resin with bisphenol A epoxy resin The weight ratio is 1:1, which can achieve the best depth of punching pit and the best resistance to electrolyte adhesion to the inner layer/aluminum foil layer.

As shown in Figure 1, the aluminum-plastic film packaging material 10 of the present invention is a laminated structure, suitable for making aluminum-plastic film packaging for lithium batteries, adopting cold stamping, possessing suitable elongation, higher impact resistance strength, tear strength and breaking strength.

Described aluminum-plastic film packaging material 10 has two kinds of different laminated structures, and its first kind of laminated structure, as shown in Figure 1, comprises the substrate layer 20 that is made of heat-resistant resin film, and from One side of the substrate layer 20 is at least sequentially laminated with an adhesive layer 30, an aluminum foil layer 40, an anti-corrosion layer 50, a bonding layer 60, and an inner layer 70 made of a thermoplastic resin film; wherein, on the aluminum foil One side of the layer 40 is provided with the anti-corrosion layer 50, so that the aluminum foil layer 40 has water resistance and acid resistance, so as to prevent the aluminum foil layer 40 from being corroded.

In the composition of described bonding glue, select two or more epoxy resins to mix, and limit the total amount of epoxy resin used in described bonding glue between 5~30wt%, can improve the aluminum-plastic of the present invention Physical properties such as the depth of the punching pit of the film packaging material 10 and the adhesiveness of the electrolyte. For example, among the components of the laminating glue, bisphenol A epoxy resin and novolac biphenyl formaldehyde epoxy resin are selected to be mixed in a weight ratio of 1:1, and the total am...

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Abstract

The invention discloses an aluminum plastic film package material for a lithium battery. The aluminum plastic film package material for the lithium battery has the water proofing performance, the high temperature resistance and the corrosion resistance and is in a lamination structure comprising a base material layer, a bonding layer, an aluminum foil layer, a corrosion resistant layer, a joint layer and an inner layer from the outermost layer to the innermost layer; one side surface or two side surfaces of the aluminum foil layer can be coated with conductive coating and the coating is solidified so as to form the corrosion resistant layer; the joint layer between the corrosion resistant layer and the inner layer can be formed by using fluorinated polyurethane resin joint adhesive. When the aluminum plastic film package material is applied to the aluminum plastic film package of the lithium battery, the excellent water proofing performance, high temperature resistance and corrosion resistance of the lithium battery can be promoted, and the service life of the lithium battery can be prolonged.

Application Domain

Protective equipmentSynthetic resin layered products +6

Technology Topic

Temperature resistanceCorrosion resistant +8

Image

Examples

Experimental program(7)
Comparison scheme(11)

Example Embodiment

[0095] [Example 1]

[0096] Add 100 parts by weight of polyol (product of Nanya Plastics Company, Mw=3000), 1 part by weight of OH-containing modified fluorocarbon resin, and (organotin T12) catalyst, antioxidant-1010 and solvent are added to a four-mouth beaker, After mixing and heating to 80°C, adding a metered amount of toluene diisocyanate (TDI) with continuous stirring, and reacting for 5-8 hours, after cooling, a fluorine-containing polyurethane polyol is obtained.

[0097] The above-mentioned fluorine-containing polyurethane polyol is mixed with 10 parts by weight of novolac epoxy resin (product of Nanya Plastics Co., Ltd.) and multifunctional isocyanate to obtain a fluorine-containing polyurethane resin bonding adhesive.

[0098] Aluminum plastic film production:

[0099] (1) Adopting a 25-micron thick Nylon film as the substrate layer;

[0100] (2) Use polypropylene film with a thickness of 40 microns as the inner layer;

[0101] (3) Use a soft aluminum foil with a thickness of 40 microns after degreasing treatment as the aluminum foil layer, and use a gravure coater to coat the polyaniline conductive paint (product of Nanya Plastics Company) on the aluminum foil, and form an anti-corrosion layer after curing. In order not to affect the color of the aluminum foil, the coating thickness of the anti-corrosion layer is 100 nm.

[0102] (4) Use polyamine-based adhesive (product of Nanya Plastics Company) to attach the substrate layer to the surface of the aluminum foil layer that is not coated with the anti-corrosion layer;

[0103] (5) Use the fluorine-containing polyurethane resin adhesive of this embodiment to attach the inner layer to the surface of the anti-corrosion layer of the aluminum foil layer;

[0104] (6) Aluminium plastic film is made into aluminum plastic film after curing temperature 60℃ and curing time 5 days.

[0105] The physical properties of the aluminum-plastic film were tested, and the results are shown in Table 1.

Example Embodiment

[0106] [Example 2]

[0107] Using the adhesive composition of Table 1, the fluorine-containing polyurethane polyol of Example 1 was synthesized with 5 parts by weight of OH-containing modified fluorocarbon resin, and the rest of the aluminum-plastic film production conditions were the same as those of Example 1.

[0108] The physical properties of the aluminum-plastic film were tested, and the results are shown in Table 1.

Example Embodiment

[0109] [Example 3]

[0110] Using the adhesive composition in Table 1, the fluorine-containing polyurethane resin adhesive of Example 1 was replaced with 20 parts by weight of bisphenol A epoxy resin and 20 parts by weight of novolac phenol formaldehyde epoxy resin, and the rest was made of aluminum plastic The film conditions are the same as in Example 1.

[0111] The physical properties of the aluminum-plastic film were tested, and the results are shown in Table 1.

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PUM

Property	Measurement	Unit
Thickness	10.0 ~ 50.0	µm
Thickness	30.0 ~ 100.0	µm
Thickness	10.0 ~ 60.0	µm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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